Do you still have those eight albums? If so, then re rip them using dbpoweramp, then check/edit the metadata.
Last week, I re ripped all my CD collection, having previously ripped them on a UnitiServe...which left loads of albums in a right old state. That's without the one's that the UnitiServe spat out!
Later today, I'll have a bash at the shortcut method, and try both Siri and Shazam.
If that doesn't prove successful, I'll drag the offending CD's out from storage and try re-ripping them, having downloaded dbpoweramp .................... no, wait, that's not gonna work, as I have no way of identifying them.
It's all fun, innit?
Are the CDs not in their original cover/cases, or are they copies on blank CDs?
They are in their original cases, but to try and track them down amongst more than 3000 stored CD's would be almost impossible.
I should really have been paying more attention to the ripping outcomes at the the time, but as mentioned, this was during my initial intensive ripping sessions, where the discs were being chucked into the HDX, one after another.
I'm able to recognise the music on half of the offending eight, but the n-Serve database can't pick them up, so it does look as if something like dbpoweramp, as you suggest, may be the answer.